Many real estate agencies book vacation rentals on Giglio. One of the most well-established agencies, with a strong local presence, is Agenzia Baffigi (tel. 0564/804140; www.isolagiglio.com); as is standard on Italian islands, the minimum stay in summer is 1 week. The Pro Loco office can put you in touch with islanders who rent out individual apartments and rooms.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.